I just finished making a side draft hood that sits on the end of my Canady Otto forge. I made the hood frame from 1 inch angle iron and covered with 16 gauge sheet metal. Went out the side of the pole building with 8 inch pipe. Once the flue gets warm ( burn a wad of newpaper to heat the flue) it will suck the fire sideways into the flue with a man door open just to the end of the forge and a 10x10 sliding door wide open. I am posting pictures in the gallery, they are to big to post here.